Auto Captions for Twitch Streams
Auto-captions on your Twitch stream — real-time, accurate, configurable. No plugin install, no model download. 60-second setup via OBS browser source.
What "auto captions" means for Twitch
Auto captions = automatic speech-to-text transcription that turns your spoken words into captions on screen, without a human transcriber. They're called "auto" because the only setup is enabling the source — the captions generate themselves as you speak.
Quality of auto-captions varies widely. YouTube's auto-captions famously had >30% error rates in years past. Modern speech-to-text models (Deepgram nova-3, OpenAI Whisper, Google Speech-to-Text v3) hit 95%+ accuracy on clear speech.
How StreamTranslate auto-captions Twitch streams
- Sign up at /control
- Set source language = English, target language = English (this is the "auto-caption" mode)
- Copy the OBS browser source URL
- Add as OBS Browser Source (1920x1080)
- Start streaming — auto-captions appear in real time
Auto-captions vs pre-recorded captions
Auto-captions: generated live during your stream, sub-2-second latency. No human review.
Pre-recorded captions: generated after the stream from the recording, can include human review and corrections. Higher accuracy but not real-time.
For live streams, auto-captions are the only realistic option (you can't have human review at 2-second latency). For VODs and clips, you can re-process with human review for higher accuracy if needed.
Customizing your auto-captions
Auto-captions don't have to look generic. Customize:
- Font size — 20-80px slider
- Outline thickness — 0-4px (visibility on any background)
- Color — text + outline colors customizable
- Position — top, bottom, custom
- Font family — Inter, Impact, Arial, etc.
- Word-by-word vs full-sentence — choose how captions appear